Stepped gear train for toothed belt - has segmented toothed discs moving to and from centre to change overall disc dia

摘要

The drive toothed disc (1) is connected to the driven toothed disc (1a) by a toothed belt such that the active dia. of at least one disc can be changed stepwise. At least one disc is divided into segments (4) which can slide on a holder (2) radially away from the fulcrum (X) or towards it. The segments of the disc which do not engage directly the toothed belt can be moved inwards or outwards in accurately defined steps and can then be locked again to engage the toothed belt. ADVANTAGE - Slip-free drive with a very small friction loss.